I'm in the same boat - and also started panicking when I saw how many people heard last week. So, I caved and called the admission office to ask about their notification timeline, and the woman I spoke to indicated that they're working on a rolling system and will continue to notify people through early April. The good news is that it sounds like not having heard yet doesn't mean anything negative, but the bad news is that we all have to keep waiting...
Anyone have any additional info?